Aspects related to a standard (e.g., functions, codes, etc.) not defined by the standard, but offered by a single vendor within the framework of the standard.

Functionality unique to a given vendor may be exposed using standard methods. For example, many vendors offer vendor-specific SNMP MIBs that users of the SNMP standard can use to obtain system information.

From an application standpoint, a virtual device is equivalent to a physical one. In some implementations, virtual devices may differ from physical ones at the operating system level. E.g., booting from a host based disk array may not be possible.

A Fabric identified by a VF_ID composed of partitions of switches and N_Ports having the properties of: 1) a single Fabric management, 2) independence from all other Virtual Fabrics, e.g., an independent address space.

VTLs are usually classified as near-online devices, and provide faster Max TTFD than tape, but normally not as fast as online systems. They typically use slower drives with higher capacities than high-performance systems, and therefore offer a better energy footprint per unit of data.

A logical collection of removable media designated for a given purpose, for example, for holding the copies of a single repetitive backup job, or for backing up data from a given client or set of clients.